function showuebersichtToggle() {
  if (document.createTextNode) {
    // Uses DOM calls to avoid document.write + XHTML issues

    var linkHolder = document.getElementById('uebersichttitle')
    if (!linkHolder) return;

    var outerSpan = document.createElement('span');
    outerSpan.className = 'uebersichttoggle';

    var toggleLink = document.createElement('a');
    toggleLink.id = 'togglelink';
    toggleLink.className = 'internal';
    toggleLink.href = 'javascript:toggleuebersicht()';
    toggleLink.appendChild(document.createTextNode(uebersichtHideText));

    outerSpan.appendChild(document.createTextNode('['));
    outerSpan.appendChild(toggleLink);
    outerSpan.appendChild(document.createTextNode(']'));

    linkHolder.appendChild(document.createTextNode(' '));
    linkHolder.appendChild(outerSpan);

    var cookiePos = document.cookie.indexOf("hideuebersicht=");
    if (cookiePos > -1 && document.cookie.charAt(cookiePos + 8) == 1)
     toggleuebersicht();
  }
}

function changeText(el, newText) {
  // Safari work around
  if (el.innerText)
    el.innerText = newText;
  else if (el.firstChild && el.firstChild.nodeValue)
    el.firstChild.nodeValue = newText;
}

function toggleuebersicht() {
 	var uebersicht = document.getElementById('uebersicht').getElementsByTagName('ul')[0];
  var toggleLink = document.getElementById('togglelink')

 	if(uebersicht && toggleLink && uebersicht.style.display == 'none') {
     changeText(toggleLink, uebersichtHideText);
 		uebersicht.style.display = 'block';
     document.cookie = "hideuebersicht=0";
	} else {
    changeText(toggleLink, uebersichtShowText);
		uebersicht.style.display = 'none';
    document.cookie = "hideuebersicht=1";
	}
}